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Author Topic: Why does the fan on my computer make this loud noise?  (Read 33527 times)

Offline Chemistry4me

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It's happened 2-3 times in the last month, when I turned my computer on, the fan at the back was going crazy, whirling around and making a big racket. I'm wondering it could be dirty/clogged up? Should I take it out and clean it? Or is it another problem? Because the next time I turned it on it was fine.  :-X
« Last Edit: 08/05/2009 01:02:08 by Chemistry4me »


 

Offline LeeE

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Why does the fan on my computer make this loud noise?
« Reply #1 on: 08/05/2009 01:58:27 »
I'm guessing that it's the fan in the PSU that's causing the noise.  If so, it's doing so because the fan bearing has worn and become loose so that it's rattling in it's bearing.  If you're up to taking it out to clean it then you might as well just replace it.  Have you got & can you use a soldering iron? (If it's a PSU fan it probably won't be plugged but soldered).  If so, a replacement fan will be cheap - just a few UK Pound - you'll just need to check the voltage and diameter.
 

Offline Chemistry4me

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Why does the fan on my computer make this loud noise?
« Reply #2 on: 08/05/2009 02:05:20 »
Thanks.
Hmm.....on second thoughts it will not be very easy to take out at all. I thought it would be easier. I'll have to take the whole thing apart. :-X
You sure there is not other way?
 

Offline RD

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Why does the fan on my computer make this loud noise?
« Reply #3 on: 08/05/2009 02:11:09 »
High CPU usage causes the fan to be activated (to cool the hot chip).
Software problems can cause high CPU usage and frequent/prolonged fan.

Such software problems would include conflict between legitimate programmes, or infection by virus/malware.

If you have a windows system you could have a look at the "Reliability and performance monitor",
it will tell you if your "crazy" fan is due to high CPU and what programmes are causing it.
« Last Edit: 08/05/2009 02:14:55 by RD »
 

Offline Chemistry4me

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Why does the fan on my computer make this loud noise?
« Reply #4 on: 08/05/2009 02:14:02 »
I just scanned it this morning and it was fine.
So you think I should use my computer less?
 

Offline RD

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Why does the fan on my computer make this loud noise?
« Reply #5 on: 08/05/2009 02:25:20 »
I just scanned it this morning and it was fine.

A virus-scan would not necessarily show malware, and would not show conflict between programmes,
(e.g. if you had two anti-virus programmes each activating the other).

Unfortunately there are things which standard virus scans cannot detect called rootkits, used to install adware and malware.

High CPU usage (indicated by fan on frequently) can be symptom of a software problem, including infection.
Like I said, have a look at "reliability and performance monitor" to see what is causing your "crazy" fan.
« Last Edit: 08/05/2009 04:08:17 by RD »
 

Offline Chemistry4me

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Why does the fan on my computer make this loud noise?
« Reply #6 on: 08/05/2009 02:28:32 »
I have Windows Vista and I don't seem able to find the "reliability and performance monitor"
 

Offline RD

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Why does the fan on my computer make this loud noise?
« Reply #7 on: 08/05/2009 02:35:25 »
Click on the windows logo bottom left of the screen and Put "Reliability and performance monitor" in the "start search" box.           

[If you cannot find it then perhaps you shouldn't look at it].


Here is a snapshot of mine ...

« Last Edit: 08/05/2009 02:40:21 by RD »
 

Offline Chemistry4me

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Why does the fan on my computer make this loud noise?
« Reply #8 on: 08/05/2009 02:59:05 »
How can I tell what is causing it?

 

Offline Chemistry4me

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Why does the fan on my computer make this loud noise?
« Reply #9 on: 08/05/2009 03:00:45 »
Does low disk space have anything to do with it? A message has just popped up about that.
 

Offline RD

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Why does the fan on my computer make this loud noise?
« Reply #10 on: 08/05/2009 03:12:31 »
If your hard disk is nearly full (or fragmented) then this will unnecessarily tax the CPU.

You could try "Disk defragmenter" (put in Windows search box).
If you activate rhe "Disk defragmenter" programme it will tell you when it was last run,
if it has been weeks since last run then run the programme to tidy up your hard disk.

[The defragmenter is usually scheduled to run automatically daily or weekly].   
« Last Edit: 08/05/2009 03:31:06 by RD »
 

Offline Chemistry4me

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Why does the fan on my computer make this loud noise?
« Reply #11 on: 08/05/2009 03:21:47 »
I'm deleting some files to see if that'll work. :)
 

Offline Chemistry4me

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Why does the fan on my computer make this loud noise?
« Reply #12 on: 08/05/2009 03:26:45 »
You could try "Disk defragmenter" (put in search box).
Okay thanks for your help. :)
 

Offline syhprum

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Why does the fan on my computer make this loud noise?
« Reply #13 on: 08/05/2009 22:27:44 »
You are not likely to be able to fix a worn out fan with software take your courage in both hands and get out your screwdrivers and soldering iron and change the thing!
 

Offline iko

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Why does the fan on my computer make this loud noise?
« Reply #14 on: 08/05/2009 22:56:03 »
Hi FixItYourself troubleshooters!

Here is a Video4you:

feature=PlayList&p=A97C81D68C353E7F&playnext=1&playnext_from=PL&index=5

ikoD 
 

Offline Chemistry4me

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Why does the fan on my computer make this loud noise?
« Reply #15 on: 09/05/2009 01:48:17 »
take your courage in both hands and get out your screwdrivers and soldering iron and change the thing!
Oh shucks! I was hoping it wouldn't come to this! :D
 

Offline RD

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Why does the fan on my computer make this loud noise?
« Reply #16 on: 09/05/2009 04:33:56 »
Would a mechanical fault be intermittent ?
 

Offline Chemistry4me

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Why does the fan on my computer make this loud noise?
« Reply #17 on: 09/05/2009 04:53:31 »
Ah, who to believe on this matter? :)
 

Offline Raghavendra

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Why does the fan on my computer make this loud noise?
« Reply #18 on: 09/05/2009 10:59:09 »
I think, it's a starting problem.. you always clean it
 

Offline syhprum

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Why does the fan on my computer make this loud noise?
« Reply #19 on: 09/05/2009 20:49:45 »
 "Would a mechanical fault be intermittent ?"

The bearing of the fan spins on a steel shaft and when worn can move to some degree along that shaft.
At times it will settle on a worn part of the shaft and vibrate at other times it will settle on a less worn part of the shaft and run smoothly.
Another source of fan noise is the one on the CPU heat sink, this is controlled by the software to attempt to maintain the CPU at its correct operating temperature.
With age the heat sink compound between the CPU and its heat sink deteriorates and the fan is set to run faster to do its job the cure for this is to dismantle and replace this compound a rather delicate job for the inexperienced !. 
« Last Edit: 09/05/2009 20:57:50 by syhprum »
 

Offline syhprum

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Why does the fan on my computer make this loud noise?
« Reply #20 on: 12/05/2009 21:09:48 »
When I worked as service technician maintaining large HELL scanner/recorders I found that young service tech's (especially those with university degrees) thought they could fix every problem sitting at the computer terminal whereas 95% of the problems were mechanical.
I expect it is even worse now computers are so common!. 
 

Offline turnipsock

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Why does the fan on my computer make this loud noise?
« Reply #21 on: 12/05/2009 23:37:52 »
If you dig out the fan, you can peel back the little bit of sticky paper that covers the bearing and drop in some light oil. The fan will be fine for a while after that.
 

Offline chris

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Why does the fan on my computer make this loud noise?
« Reply #22 on: 12/05/2009 23:54:33 »
I got fed up with the sound of a whirlwind occurring every time I did something mildly taxing on my computer so I purchased a huge noctua heatsink and fan. It was almost silent and has performed beautifully for over a year now. I can recommend it.

Chris
 

Offline Chemistry4me

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Why does the fan on my computer make this loud noise?
« Reply #23 on: 13/05/2009 06:39:03 »
(Not that I am planning on doing this) If I left the fan as it is for say, another year, will my computer crash?
 

Offline Chemistry4me

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Why does the fan on my computer make this loud noise?
« Reply #24 on: 13/05/2009 06:41:29 »
so I purchased a huge noctua heatsink and fan. It was almost silent and has performed beautifully for over a year now. I can recommend it.
Thanks. So how much was it?
 

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Why does the fan on my computer make this loud noise?
« Reply #24 on: 13/05/2009 06:41:29 »

 

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